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qcow2: mark various functions as coroutine_fn and GRAPH_RDLOCK

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Functions that can do I/O (including calling bdrv_is_allocated
and bdrv_block_status functions) are prime candidates for being
coroutine_fns.  Make the change for those that are themselves called
only from coroutine_fns.  Also annotate that they are called with the
graph rdlock taken, thus allowing them to call bdrv_co_*() functions
for I/O.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20230309084456.304669-9-pbonzini@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-03-09 09:44:55 +01:00 • committed by Kevin Wolf
parent 10bf10a8e3
commit a39bae4ecd
6 changed files with 53 additions and 45 deletions
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8
block/qcow2-refcount.c
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@ -1030,8 +1030,8 @@ int64_t qcow2_alloc_clusters(BlockDriverState *bs, uint64_t size)
return offset;
}
int64_t qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
int64_t nb_clusters)
int64_t coroutine_fn qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
int64_t nb_clusters)
{
BDRVQcow2State *s = bs->opaque;
uint64_t cluster_index, refcount;
@ -1069,7 +1069,7 @@ int64_t qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
/* only used to allocate compressed sectors. We try to allocate
contiguous sectors. size must be <= cluster_size */
int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size)
int64_t coroutine_fn qcow2_alloc_bytes(BlockDriverState *bs, int size)
{
BDRVQcow2State *s = bs->opaque;
int64_t offset;
@ -3685,7 +3685,7 @@ out:
return ret;
}
int64_t qcow2_get_last_cluster(BlockDriverState *bs, int64_t size)
int64_t coroutine_fn qcow2_get_last_cluster(BlockDriverState *bs, int64_t size)
{
BDRVQcow2State *s = bs->opaque;
int64_t i;